Fern Ridge Trail is closed until 3 p.m. on April 1. Also closed during this time is the portion of Graham Cave Trail between the cave and the interpretive shelter near the lower parking lot. A managed burn was conducted in these areas.

All other trails and areas of the park are open under normal off-season operations.

All trails in Prairie State Park will be closed daily from 4 p.m. to 9:30 a.m. through April 30, 2015. These temporary closures aid in the protection of the greater prairie chicken. Hiking is allowed from 9:30 a.m. to 4 p.m. daily.

Due to wet conditions, Four Winds Trail is partially closed to equestrian and bicycle use until April 15. The affected section is from the equestrian trailhead at Hwy. 134 northeast one mile to the junction of the North and South loops. The trail remains open for hiking.